Computer small enough to fit in a person's palm.
Palm PCs (also called palmtops, handheld computers, or personal data assistants) typically use pens instead of keyboards for data input. They have limited memory and lack built-in peripheral devices (e.g., disk drives and modems), though such devices can be plugged in through peripheral slots. They run a limited set of application programs, such as calendars, address books, and memo pads.